Nathan Fillion as Batman? Probably not, he says.

Whether Christian Bale has or has not been offered $50 million to reprise his role as Batman in Man of Steel2 remains a mystery. (He probably hasn’t.) But with the suit officially unoccupied – as of now– the race is on to find a new Batman. But one name you can probably cross off your list? Castle star and generally geek-loved actor Nathan Fillion.

“I wonder if my throat could take it,” he said, joking that he doesn’t believe he has the vocal stamina to mimic Batman’s gravelly voice. “I think I’d make an excellent Bruce Wayne; I think I’d make a terrible Batman.”

Fillion, who is no stranger to superheroes and recently voiced the Green Lantern in the straight-to-DVD animated movie Justice League: The Flashpoint Paradox, adds that he has not been approached in any way about the role. He also cautions fans who are currently stumping for certain actors to get the part – even those stumping for him. “If you wanted to see a particular person as Batman, I think one of the worst things you could do is shove it down someone’s throat as far as the new director of Batman or the new producers of Batman,” he says. “Probably the worst thing you could do if there’s someone you want to be Batman is sort of rally.”

Batman or not, Fillion will soon (finally!) be back on the small screen when Castle returns Sept. 23 on ABC. For more on the show’s return, pick up EW’s Fall TV preview issue, out next month.